The first page of the trademark applications for Rumi and Sir Carter. USPTO

Both trademark applications were signed by Beyoncé's mother, Celestine Knowles Lawson, June 26, 2017. According to the documents, each application had a fee of $4,125 — not bad to have your kids' names on a lot of baby merch.

Drawings of the mark applications which don't have claims to "any particular style, size, or color." USPTO

A similar trademark application was filed for the couple's daughter Blue Ivy Carter, who is now five, January 22, 2016.